Spray gun



L. L. TIRRELL SPRAY GUN Filed April 13, 1922 INVE/VTOR LL. T277191! A TTOR/VEYS Patented Aug, 14, 1923.

\ nee-sures srnAY 1W no LESLIE'L. TIRRELL, or new rnor, MICHIGAN.

GUN.

Application filed April 13, 1922. SerialNo. 552,292.

To aZZ whom z'tmay concern. 3

Be it known that I, LESLIE'L. 'TIRRELL, a citizen of theUnited States, and a resident of New Troy, inthe county of Berrien and State of Michigamhave invented a new and useful Improvement in Spray Guns, of, which the following is a fun, clear, and exact description;

My invention relates to improvements in spray guns, jandit consists in the cornbina tions, construct1ons,'and arrangementsherein described and claimed.

VAn'objeet ofmyinv'entionis to provide a device of the character describedin which liquid is thoroughly atomized and subse V quently projected through a suitable nozzle.

A further object of my invention is to provide a device of the characterdescribed V inwhich the atomized liquid may be'projected at'will through one or two nozzles by j merely turning the central liquid feed tube.

A further object of 'myinvention is to provide a device of the character described in which the liquid'may be thoroughly atomized and projected through a relatively long tube attached .to the nozzle, as in spraying ceilings or the like. p V

A further object of my invention is to provide a device} of the character described which is simple in constructiomeasy to 0p erate, and which is thoroughly practical commercially. 7

Other objects and advantages will appear in the following specification, and thefnovel features of the invention will'be particularly pointed out in the appended'elaims.

My invention is illustratedin the accompanying drawings, forming part of this ap-- plication, in which i V Figure 1 1s a partial sectional view ofan cylindrical barrel 1 having secured theretoat 'its rea-rmost end a metal. fitting 2 having an integral inlet portion 3 threaded at lts view along the 1 thercb etween.

outermost end for engagement with an air hose 4 or the like. A bore 5 is centrally disposed through the rear end of the fitting 2, anda packing ring 6 is providedand arranged to engage threads 7 on the outer surface of the fitting adjacent the mouth of the bore 5. A relatively slender tube 8 is rotatably disposed within the barrel 1, the bore 5 providing bearinglat one end thereof, A valve 9 is'connected to the outermost end of the tube 8 and serves as a means for c011- trolling theflow o1 paint or other solution into .thetube 8. I

r V The forwardend of the barrel 1 is providapertures 12 and 13 extending through the front wall of the nozzle, one on each side of its central po nt. A short metal tube 1st is axially disposed through the front wall of the cap 10, and is arranged to extend within the barrel 1 and a short distance in front of the cap 10. i j

The forward portion of the tube 8 has connected thereto a spool-shaped member 15 having a centrally located bore 16. An integral partition 17 is disposed in the bore 16 intermediate its length. The rearmost edge of the member 15 is provided with an outwardly extending flange 18, which flange is I adapted to closely engage the inner walls of 'the barrel 1, and rotatably bear thereagainst.

The tube 8 is fixedly connected to the member 15 and 1s provided with tour radially extending equally spaced apart openings 19.

These openings 19 are placed into registration with openings 20 through the sleevelikeportioii 21 of the member 15, Four transverse openings 22 are provided in the flange 18, and are in registration with the axes of the openings 19 and 20. v

A second outwardly extending flange 23 is provided intermediate the length of the member 15. The flange 23 is arranged so 7 that it does not contact the inner walls of the barrel 1, but provides an annular space The flange 23 is also pro vided with transverse openings 24, which openings are in exact registration with the openings 22 in the flange 18; The bore 16 on the outer side of the partition -1 7 "-is adapted to receive-the in'wai'dlyeiitehding portion of thetube 14, and thus provides a suitable bearing forthe member :15 and the outer end of the tube 8. A. spiral compression spring 25 is disposed intermediate the inner end wall 26 of the fitting tube, and awasher 27 carried by the tub e 8. Thus,'the

tube 8 is constantly pressed toward the'noz-f zle'lOj and theuneniber'15 is in'close Contact with thefinne'rsurfa'ceof the nozzle cap 10.

' Theinw'ardly extending portion of the vidiedwith a pair of diametrically opposed outwardly extending i shutters 8O integral 7 25 tube 14 is provided with two diametrically opposed elongatedopenings '28. The t emher 15 isalso provided with two elongated openings 29, which openings are adapted to bemovedinto registration with 'the open-i ber'f 15,'is'rotated; v u V 'The outer end' of'the ine'inber 1 5' s'pro ings 28 whenthe tube 8, carrying memtherewith. .The'se shutters are more clearly shown'inFi'gure'L, and are sodisposed relato beino'ved into registration with" the openings "12 and 13 -in the nozzle when-"the elongated openings 29 in the niember15 are in registration with the Q enings 28 in the tube 14. Thisis 'more clearly shown in Figure' l, In F'Figiue' 1 the annular portion 'cfon centric with the member 15 between "the shuttersisindicated at 8U. V

From the foregoing description of the various parts; of the device, the operation thereof may be readily understood. In using n y' 'spra'y gun, 'I' connectthe'inletB to an air compressonorsome similardevice. 'I 7 .1 ,1 -,v I. connect the'valve 9, by means of a suitable hose connection, to a reseryoir ofpa'intf'flf it is desired to-spray an object that is out ofithbrdinary reach ofthe'user, I use what I choose' to term the long distance inozzl'e, i. e., the short tubular member 14;

' havinga single o'utlet.{ This outletffonned of the; tube l lym'ay be connected by asuit aabletubular connectionto convey the atomized liquid for the necessary distance.

When the device is sensed, I nianuallyiturn the tllbtliilf member 8 so that the meniber 1 5 s'rotated t'o' 'eausetheshutters 30 to niove ntojregistration with the openings '12 and 13. As this occurs, the elongated openings 7 29 will bemoved'into registration with the opejnings 28. The course of the paint or liquid'inthe reservoir will be as follows:

The paint or liquid will enter through the tube 8 and. be projected intothe' outer poi tion of thebarrel 1' through thefour radially extending openings 20 in the member 15. The ets ofpalnt'thus formed will be in' exact registration with the openings 22 through the flange and as air is passing through these openings at a'relatively high velocityith'e paint" in the jets fI'OIH' the 'openings'20iwill 'be'atornizeth Apo'rtion of the -finely divided product will pass directly: 7

through'the openings '24, and a part will pass through the annular space between the fiange 23 and the inner wall of the barrel '1. This atomized liquid will then be blown inwardlyfthroughthe two diametrically 0pposed openings 28and 29, and ultimately outof the short'tube 14 in the form of a single finely dividedlblast ot atomized in leaving the-egunyzwillibe directed through the-openingsi12IandJ13Q openings 12 .-i ii 7..- and 13 arearrangedlnfan-llke pos tion so Ithat the spray will be distributed Over :a larger area than if "bothv'of'the openings were parallel.- At *the :sarne time, the opening29 is out of'reg-istration withtheopening 28 andthe shutters30 are out of regis-' trationwith the-openings 12; and 13. i a

'In Figure 5', 1" have shown a'n odified form of the nozzle 10, in which I have-shown in "place i of the short tube} 14;, an integral inwardly extending stub shaft 31. The bore lh is adapted "to receive the stub shaft In this for nof nozzle, I provide additional openings 32 and 33, thus increasing the dis- 7 r fion l jv tj izedilieuid:o p nt- Iclaim: 1

1. Aspray gun coinprising a barreha de- 7 tachable nozzlethere ior, said'nozzle having discharge openings therethr'ough, a short tlibedi p s tr n e se y thr ugh he end. wall or said nozzle betweensaid discharge whereby said paint solution may i-be'atem-V 'ized, and mean for selectively discharging the ato nizedpaint solution-through said di's ch arge openings andsaid'tube at will.

2. A spray gun comprising a barrel a deopenings, means; tor admitting a paint; solution and a r unclerpressure tosaljd barrel,-

30 and provides bearingfor the member 15.

tach-able nozzle therefor -said nozzle having discharge openings therethrou'g-h,-. 3 a short tube disposed transversely through the-end wall of said nozzle between saiddischarge V openings, -Ineans for admitting {air under pressure, to said barrel, a'tube forconvjeying a paint solution-into fsaid barrel, means for -pIO]GCl31I1g the air underpressure in jets uponsaid. paint solution as it :is delivered from said last named tube, 1 whereby said 'l paint solution may beato nized; and: means paint solution through said discharge openings and said first named tube at Will.

3. A device of the character described comprising a barrel, a tube disposed in said barrel for conveying a paint solution or the like, said tube being rotatably mounted on said barrel at one end, a nozzle having opening therethrough supported upon the op posite end ofsaid barrel, a spool-shaped member carried by said tube and having a shutter arranged to be moved into registration with the openings in said nozzle when said tube is rotated, and means carried by said nozzle for rotatably supporting said spool-shaped member, whereby the entire tube is rotatably mounted relative to said barrel.

LESLIE L. TIE-BELL. 

